AuxXxilium/linux_dsm_epyc7002
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x86: make c_p_a unconditional in ioremap

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Make c_p_a unconditional for ioremap and iounmap. This ensures
complete consistency of the flags which are handed to
ioremap_page_range and the real flags in the mappings.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-01-30 13:34:05 +01:00 committed by Ingo Molnar
parent f87519e8f4
commit 74ff2857f0
2 changed files with 8 additions and 10 deletions
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4
arch/x86/mm/ioremap_32.c
View File

@ -74,7 +74,7 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
/*
* Ok, go for it..
*/
area = get_vm_area(size, VM_IOREMAP | (flags << 20));
area = get_vm_area(size, VM_IOREMAP);
if (!area)
return NULL;
area->phys_addr = phys_addr;
@ -189,7 +189,7 @@ void iounmap(volatile void __iomem *addr)
}
/* Reset the direct mapping. Can block */
if ((p->flags >> 20) && p->phys_addr < virt_to_phys(high_memory) - 1) {
if (p->phys_addr < virt_to_phys(high_memory) - 1) {
change_page_attr(virt_to_page(__va(p->phys_addr)),
get_vm_area_size(p) >> PAGE_SHIFT,
PAGE_KERNEL);

14
arch/x86/mm/ioremap_64.c
View File

@ -31,7 +31,7 @@ EXPORT_SYMBOL(__phys_addr);
* conflicts.
*/
static int ioremap_change_attr(unsigned long phys_addr, unsigned long size,
unsigned long flags)
pgprot_t prot)
{
int err = 0;
if (phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT)) {
@ -50,8 +50,8 @@ static int ioremap_change_attr(unsigned long phys_addr, unsigned long size,
* the phys addr can be a in hole between nodes and
* not have an memmap entry.
*/
err = change_page_attr_addr(vaddr,npages,
MAKE_GLOBAL(__PAGE_KERNEL|flags));
err = change_page_attr_addr(vaddr, npages, prot);
if (!err)
global_flush_tlb();
}
@ -97,7 +97,7 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
/*
* Ok, go for it..
*/
area = get_vm_area(size, VM_IOREMAP | (flags << 20));
area = get_vm_area(size, VM_IOREMAP);
if (!area)
return NULL;
area->phys_addr = phys_addr;
@ -107,8 +107,7 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
remove_vm_area((void *)(PAGE_MASK & (unsigned long) addr));
return NULL;
}
if (flags && ioremap_change_attr(phys_addr, size, flags) < 0) {
area->flags &= 0xffffff;
if (ioremap_change_attr(phys_addr, size, pgprot) < 0) {
vunmap(addr);
return NULL;
}
@ -180,8 +179,7 @@ void iounmap(volatile void __iomem *addr)
}
/* Reset the direct mapping. Can block */
if (p->flags >> 20)
ioremap_change_attr(p->phys_addr, p->size, 0);
ioremap_change_attr(p->phys_addr, p->size, PAGE_KERNEL);
/* Finally remove it */
o = remove_vm_area((void *)addr);